Malek was interesting, Durkula is only interesting in reference to Durkon's failures and the Roy fight.
I still don't really care for this whole "turning into a vampire unseats you from your body and a different entity takes control" nonsense, it somewhat undermines Malek's character from being a liberated lizard wizard to being Nergal's brain pet thing that probably spent a week watching the exciting memories of a lizard man's entire life of rolling in mud, shitting pellets in water and that one really cool time he left his mouth open and a bird flew in for the fuck of it.
I assume this is just how Burlew chose to handle Durkon's religious challenge of dying in combat vs dying of a disease, but I don't feel like there was a real build up for the religious aspect of this arc.
His father died in combat to a fire troll and is probably in Valhalla with his wife's arm for company. Durkon is entirely healthy and has really never faced the prospect of his death, only knowing he would die eventually on good terms with his homeland.
Even the idea that evil vampire durkon was perfectly made for this task by Durkon is kind of silly since all you really needed were any three vampires at all: one to vote and two to rig the votes.